Guard for buzz planers



Patented Feb. l5, 1927.

stare-s riarfafafr .rs1-cn l Jai/msn.'- WA'rsort oniwln'ravAr-nir,Mas'saonesnars; assrenon on ONE-Tellen To# JULIUs'o; REICH-n,onnnnrneron,... nnssaorzusnrrs Ann oNn-'rrlrrmxmof i Guan/n' non-.Beazmann-as.'

'AppiieatioamiAprile;1926.; senaitnaiooaa This 'invention relates lto*safety guards' for Wood-.Workinglmaehines andf particularl;7

for that classknovvn asfbuzz planersthe object'. being ,tol preventlthe: hands of' the operator being injuredz duringthe operationy o themachine.

y riaoject is. attained by are@ mechanism illustrated.. in theaccompanying.drawings.

the various instrumentalities oi3 Wliichtlie irlvention consists canloe-variously arrangedy and. organized, landV the invention 1s notllmitedto -thef precise arrangement andorganization of theseinstrumentalities asfhereinshovvn, andV described except as required byythe scope oitlie appended'claims.

Of; the' drawings Y Figure 1 represents a plan of a safetyguardembodying the principles ofthe present invention. T Figure; 2.represents. a front elevation of tli'efsame'randA U" F'gurej epre'sentsVa similar vievvjsliovving ,the curvedf guard plates raisedv andresting` upena= board being operated upon.

Similar characters vindicate like parts throughout the several' figuresloft the dra'vvings.

In. the drawings,Y 10' lis ay portion of the frame. Voavvoodvvorkingii'nachine such as a l buzz planer and fromfavside'thereofI ex tendsa-,boltor stud'l'l which passes through aslot 12V ina:bar 13 andv has a nut 14; on the outer endthereof to prevent thedisplacement oi'said'bar. Y 40 Y may `move endvvise relatively 4tosaidvframe or-it may; move aboutthe axis of said bolt to accommodate it todifferent conditions. Oneend of the bar 13,has pivoted thereto at 15 anarm 16 to the'upperfface of 'which is. secured a flat metal plate 17which is curved upwardly at its outer end asV indicated at 1'8.

RivetedlA tov the under Vside of the curved portion 18is a curved guardplate 19- Which extends laterally from the plate V17 `and has f parallelslots 2O formed therein.

By means of this construction the barlB,

' bar 13v move together.

Superimposed' .uponfthe guardfplatef 19' is an extensionplate 21 whichi'sfprovideol with headed rivets 22' extending. through 5'5v said lslots20. y Ihelleadfs of the rivets QQ'impinge' upon" the guardplate 19 andextension` plate 21T in suchY a 'manner as toy create sufcient, fric'-Vtiontolretain saidextension plate 21'. in any' 60" position;tovvhich-it'may be adjusted. Y `The extension plate 21' is provided'vvithfa knob 23by' which it may be moved" endvvise of' the main guardplate 19.

' To the upper face of 1 the extension" plate 65 21"and'"near its outerend isf secured" a strap 4of'spring metal, this strap'vextending'latere'V ally from the plate 21, the outer'endoffthe; strap beingadaptedito contactvvith the' matchine table to prevent' any" shock'orn unduej 70 stress vupon the guard'plates 195 21"y during theoperation "ofthejrnachinegj,

Eivotepl to the arm' 16 at'24 and. dependiirg therefrom isaA slotted"plate 25* throughv theslotofwhich extend'sabolt'orstud 27 75 i Yprojecting from the" sijde of the machine frame 10. I Threaded to' theouterV endf of tlejbo'ltQ? said'boltor'stud QTandprevents the lacci'- 80dentalfdisplacernent thereoff f The arm 16 isreev atjall times' tomoveabout itsv pivot 15, this movement being limited in eitherA direction'by the'ends ofthe slotfl` coming intoH Contact with' bolt 27` rlhe arm16 li'aszsecured'. toits upper'a'ce a flat' spring 29,'thevfreeendofvvhioh bears f upon .the upper side of. thegbar 13,' this'rspifing"tendingto` force the" arm`V 161 dovvn-y ingjon the' bolt- 27'.The pivot 15 and spring'.QQtogetherorm alrnucllejoint so that thev arm16 may'move relatively to the bar 18 or both arm 161`an'd y One edge oi'the guard plate 1 9fiscurve`d upwardly asv at' v30 and` is' adapted2 torest upon the Work being operated uponby the Workingtools A beneath'said guard"` plate.

Wlhen no. Work isupon the'machi'ne'I table 1'00 the curved; edge 30 is*slightly above the surface ofthe said table. f By means of the*A knob 23the guard plate 19 may be raised sufficiently about its'pivot Wardlv rwithr thev upper: en'd' ofi slot' 26A` restil 90'V r 'jciently to allovvfor the variation in thickness, or vboth bar 13 andarm 16 may be yraisedabout the' pivot 11.

-When itfisdesired to obtain access to the Working tools the arm 16 andbar 13 may be raised and the Whole device swung over vonto the tableabout the axis of bolt 0r stud 11,fthe

plate being firstdisplaced'irom stud 27.

The board-B is guided by-thefstraight A edge'31 at theback of tablewhich is adjustably mounted on the machine tablevin the usual manner. 1

guard for machines of the character described Wlnch is veryA inexpensiveto construct and leasily operated. v

40 lplatesprevent any object being 'throvvn into When in use it isimpossible for the operatorto have his hands injured by the tools asthese tools are completelyl covered over except at the rearend, whichbetween the rear end of guard plate 21and the guide 31 is left uncoveredin order 'that the edge of the board may be planed, the board being heldagainst `the guide Blduring this Y operation.

v Not yonly are the handsk of the operator protected .by thek guardplate. but his eyes and face are also protectedv as Vthe guard the faceof the operatfor'while` the machine is in use. Y Y. i Y V"It is believedthat the operation and many advantages ofthe invention YWill beunderstood readily Without further description.

. yHaving thus.- described my invention7 l claim: Y

posed bar secured to the side et a machine frameV provided Withrevoluble YWorking tools; an arm pivoted to the end of vsaid bar; aguard plate extending laterally from the end of said arm over theWorking tool; yielding means for retaining. said guard plate incontactwith the Work; and means for limiting the movement of said armabout its pivot. f

f 2. The combination of a horizontally dis-v posed bar secured to theside of a machine frame" provided" With revoluble .Working tools; meanspermitting vend movement of lsaid bar relatively to said frame; an armpivoted to the end ofsaid bar; a guard plate extending laterally fromthe end of said This makes a very simple but effective upper side ofsaid arm and projectingover Y and in contact with sa1d'bar;a guard plateextending laterally irom the end oi said arm over the Working tools; andmeans for lim-V iting the movement of said arm about its pivot.` i

4l. Thecombinationfot a bar'secured side of a machine frameI provided.With rev-KV oluble Working; tools;v an arm 'pivotedfto'j the end ofsaid bar; a guard plate extend-V q ing laterally from the end of saidarm over the Workingto'ols; aV strap secured tothe outer end of theguardiplate and vextending laterally therefrom adapted to contactv withthe machine table; and means Vfor limiting the movement kof saidarmjabout its pivot.

g5. The combination of a bar secured to the. side of a machine frameprovided with rev-Y oluble Working tools; an arm pivoted to theV end ofsaid bar; a slotted plate ypiv'otedto the free endof said arm; means onsaidV trame extending through the slot of said plate and serving as aVguide therefor; a guardy plate extending laterally from' the .end ofsaidarm over the Working" tools; yielding meansV for retaining lsaidguard plate in contact Withpthe Work; and means for, limiting themovement of saidVV arm about its pivot.

f 6. vThe combinationrof a barY pivotedwto the side of a 'machine frameprovidedr'with revoluble Working tools; an arm pivoted 'to the end ofsaid bar; a guardA plate extend#- ing laterally from the Yend of saidarmover the Working tools; and lmeans. for limiting the movement of Saidbar about itsy pivot. A 7. The combination of abar pivoted to theV side4of a machine frame provided With revoluble Workingtools; meanspermitting end movement oi said member end vvise relal y .f Y tively tosaid frame and swinging move- 1. vThe combination of a horizontallydis.-V

ment aboutjits pivot; 'an arm pivoted to the yend of said bar; a guardplate'extendi'ng laterally from the end of said armv over the Workingtools; and means for limiting p 'the movement of said bar about its'pivot.

8. The combination of a bar pivoted tol the side of a machine frameprovided with krevoluble Working tools an arm Vpivoted tothe end of saidbar; a spring secured to the side of a machine frame provided Withrevoluble Working tools and 'movable end` Wise on saidpivot; an afinpvoted to the end of said bar; `a vguard plate extendinglaterally'therefrom'adapted to Contact With the machine table; and means,for limiting.

the'fmovement of said bar and arm about their pivots.

Signed byl me at 746 Old South Bldg.,

, oston7 Mass.,this 1st day of'April, 1926.

JAMESA B. WATSON.

